DIGITAL MAP SHAPE VECTOR ENCODING METHOD AND POSITION INFORMATION TRANSFER METHOD

摘要

Digital map position information is encoded with a small data amount by utilizing the compression encoding technique. In a method for encoding data representing a shape vector on a digital map, a node string representing the shape vector and position information representing a shape are subjected to arithmetic processing so as to be represented in statistically deflected dat a and the statistically deflected data is encoded to reduce the data amount. Thus, it is possible to significantly reduce the transfer data amount when transferring a vector shape of a digital map.